#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
char* my_strcpy(char* des, char const* sor) {
	assert(des&&sor);
	char* ret = des;
	while(*des++ = *sor++) {
		;
	}
	return ret;
}
int main() {

	char a[] = "dsfasdf";
	char b[] = "bit";
	printf("%s", my_strcpy(a, b));

	return 0;
}